Siemens 6RA7013-6DV62, Operating Instructions Manual

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Start-Up 05.05
7-24
SIEMENS AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
A total of five PPO types are defined:
PKW section PZD section
PKE IND PWE PZD1
STW
1
ZSW
1
PZD2
HSW
HIW
PZD3 PZD4 PZD5 PZD6 PZD7 PZD8 PZD9 PZD
10
1
st
word
2
nd
word
3
rd
word
4
th
word
1
st
word
2
nd
word
3
rd
word
4
th
word
5
th
word
6
th
word
7
th
word
8
th
word
9
th
word
10
th
word
PPO1
PPO2
PPO3
PPO4
PPO5
PKW: Parameter ID value IND: Index ZSW Status word
PZD: Process data PWE: Parameter value HSW: Main setpoint
PKE: Parameter identifier STW: Control word ISW: Main actual value
The
acyclic channel MSCY_C2
(see diagram above) is used exclusively for the start-up and
servicing of DriveMonitor.
7.7.2.1 Mechanisms for processing parameters via the PROFIBUS:
The PKW mechanism (with PPO types 1, 2 and 5 and for the two acyclic channels MSAC_C1 and
MSAC_C2) can be used to read and write parameters. A parameter request job is sent to the drive
for this purpose. When the job has been executed, the drive sends back a response. Until it
receives this response, the master must not issue any new requests, i.e. any job with different
contents, but must repeat the old job.
The parameter section in the telegram always contains at least 4 words:
PKE IND
Parameter identifier Index Parameter value 1
PWE1 (H word)
Paramter value 2
PWE2 (L word)
Details about the telegram structure can be found in Section 7.7.9, "Structure of request/response
telegrams“, and in the PROFIBUS profile "PROFIBUS Profile, Drive technology" of the user's
organization PROFIBUS International (http://www.profibus.com).
The
parameter identifier PKE
contains the number of the relevant parameter and an identifier
which determines the action to be taken (e.g. "read value").
The
index IND
contains the number of the relevant index value (equals 0 in the case of
nonindexed parameters). The IND structure differs depending on the communication mode:
-
Definition in the PPOs (structure of IND with cyclical communication via PPOs)
-
Definition for acyclical channels MSAC_C1 and MSAC_C2 (structure of IND with acyclical
communication)
The array subindex (referred to simply as "subindex" in the PROFIBUS profile) is an 8-bit value
which is transferred in the
high-order
byte (bits 8 to 15) of the index (IND)
when data are
transferred cyclically via PPOs
. The low-order byte (bits 0 to 7) is not defined in the DVA profile.
The low-order byte of the index word is used in the PPO of CBP2 to select the correct number
range (bit7 = Page Select bit) in the case of parameter numbers of > 1999.
In the case of
acyclical data traffic
(MSAC_C1, MSAC_C2) the number of the index is transferred
in the
low-order
byte (bits 0 to 7). Bit 15 in the high-order byte is used as the Page Select bit. This
assignment complies with the USS specification.
Index value 255 (request applies to all index values) is meaningful only for acyclical transmission
via MSAC_C1. The maximum data block length is 206 bytes with this transmission mode.